Dir for making bullets and similar articles.



A. C. GAYNOR.

DIE-FOR MAKING BULLETS AND SIMILAR ARHCLES,

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1,234,654. Patehted-Jflly 24-, 1917.

WITNESS ATTORNEY "UNITED STATES PATENT OFFICE.

.A-IRTHUR 1G. GAYNOR, F: BRI'DGEPORT, CON.NEC-TICU T.

DIE ron vmxme BULLETS AND SIMI AR narrows.

To all whom it may concern:

Be it known that I,ARTHUR C. GAYNOR, a citizen of'the United States, residing at Bridgeport, county of F airfield, State of Connecticut, have invented an Improvement in Dies for Making Bullets and Similar Articles, of which the following fication,

This invention relates to the manufacture of bullets and similar articles, and has for its object to provide dies that will stand the stress of continued hard usage much longer than any dies heretofore known to the trade, thereby greatly reducing the cost of production, as dies for making bullets and similar articles are very expensive and the dies heretofore used could not be prevented from getting out of true and the openings therein from partly closing, thus making it impossible to produce bullets within the specified tolerances and necessitating new dies. I have found my present invention especially valuable in the swaging of bullets made from brass, bronze or copper wire, in which blanks shaped wholly diflerently from the completed bullets are required to be swaged to is a speciform.

With this and other objects in view I have devised the novel dies which I will now describe, referring to the accompanying drawing forming a part of this specification, and using reference characters to indicate the several parts:

Figure 1 is a vertical section of my novel dies as in use and the cooperating parts, part of which are in elevation;

Fig. 2 a perspective on a reduced scale, partly broken away, of the upper die block removed and the die separated therefrom, and

Fig. 3 is a similar view of the lower die block and die.

10 denotes the upper die, 11 the upper die I block, 12 the lower die, and 13 the lower die block. The lower die block is seated in a recess in a block 14:, which rests upon a bed, not shown, and is provided with a circumferential groove 15 which receives the ends of set screws 16 in the block to lock the die block in place. The essential features of the present invention are that both dies taper I outward and backward from their faces, the

recesses in the die block to receive them being of course correspondingly shaped, and each die is backed up by a removable backing block. Stated in other words, the dies 7 Specification of Letters Patent.

.and rests upon block 14.

are of smallest diameter at their faces and ofgreatest diameter at their rear 'endsand taper uniformly from. face 'to back, and the strains of use are not taken up by the die blocks, but are transmitted 'to the backing blocks; The recess in the lower die is shape to form the heel and approximately one-half of the completed bullet. The lower die rests upon afbackinglblock 17 which isreceived in a corresponding recess in the lower die block 18 denotes an ejector which is seated in recesses in block 14 and the backing block, and the operative portion of which extends through the back ing block and into the lower die, the face of the ejector serving in fact as, the bottom of the opening in the die.

- Patented July 24, 19137 Application filed June 23, 1916. Seria1 No. 105,508. I I

The back of the upper die bears against a I i backing block 19 seated in a corresponding recess in the upper die block, which is itself seated in a corresponding recess in the drop 20 and is provided with a circular groove 21 to receive set screws 22 in the drop. The upper die is provided with a longitudinal opening 23, extending through to the back, which receives surplus metal in form of a teat at the point end of the bullet. 24 denotes a guide ring which is rigidly secured to the lower end of the upper die block, as by a drive fit, and is adapted to receive the upper end of the lower die block with a sliding fit. This in sures perfect alinement of the die blocks in use, and the backward and outward taper of. the dies, which causes the strains of use to be transmitted to the backing blocks, acts to greatly prolong the life of the dies. When it is necessary to change dies, the die blocks are removed, then the dies and backing blocks are pushed out from the front, the new dies are inserted from the back in each die block, the backing blocks are set in place, and the die blocks returned to their operative position and secured there by the set screws. I find in practice that the present block. My present dies remain in alinement for a relatively long time, the openings do not commence to close, and the product easily falls within the specified tolerances.

Having thus described my invention, I claim:

1. In combination, dies tapering from their bases toward their contiguous faces, die blocks having correspondingly shaped recesses, and backing blocks which support the dies at the bases of the latter and contribute to the reception of the strains of use.

2. In combination, dies tapering from I their bases toward their contiguous faces,

die blocks having correspondingly shaped recesses to receive the dies and other recesses contiguous to the die recesses, and backing blocks seated in the last mentioned recesses which support the dies through the bases of the latter and contribute to the reception of the strains of use.

3. In combination, dies tapering from their bases toward their contiguous faces, die blocks having correspondingly shaped recesses and circumferential grooves, backing blocks which support the dies through the bases of the latter and contribute to the reception of the strains of use, and set screws engaging the grooves in the die block whereby the parts are retained in place.

In testimony whereof I affix my signature.

ARTHUR C. GAYNOR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of .Patents,

Washington, D. 0. 

